Perturbed surface density at three different time (from left to right) for three planetary accretion rates, with 0.1 (top), 1 (middle) and 10 (bottom) times the nominal accretion rate, in discs with α = 10⁻⁴, h = 0.05. Red dotsshow the position of the planet. First row: density snapshots for the reduced by 10 accretion rate. As the planet is growing really slowly, the gap edges are not very steep, creating a very weak vortex. Second row: density snapshots for the fiducial accretion rate. The edges of the created gap are steep enough to trigger the RWI, creating a vortex. The vortex vanishes after ~ 8.1 × 10⁴ yr. Third row: density snapshots for the enhanced by 10 accretion rate. The planet is growing so fast that the edges of the created gap are steep, triggering the formation of a vortex stronger than in the previous cases. The vortex vanishes after ~ 5.3 × 10⁴ yr.